#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
#include <vector>
using namespace std;

int numDistinct(string s, string t) {
    int m = t.size();
    int n = s.size();

    vector<vector<double>> dp(m + 1, vector<double>(n + 1, 0));

    for (int i = 0; i <= n; ++i)
        dp[0][i] = 1;

    for (int i = 1; i <= m; ++i)
    {
        for (int j = 1; j <= n; ++j)
        {
            dp[i][j] = dp[i][j - 1];
            if (t[i - 1] == s[j - 1])
            {
                dp[i][j] += dp[i - 1][j - 1];
            }
        }
    }

    return dp[m][n];
}

int main()
{

	return 0;
}